Mount Hesperus is the highest peak of the Revelation Mountains, the westernmost subrange of the Alaska Range.

The Revelations are a small, rarely visited range, but they contain dramatic rock peaks, rising from low bases.

Mount Hesperus is particularly impressive in terms of local relief: for example, it drops over 7,500 feet (2,286m) in less than 2 miles (3,219m) on two sides.

Mount Hesperus lies to the north of most of the other peaks of the Revelation Mountains, between two forks of the Big River.

The first ascent of Mount Hesperus was on May 2, 1985, by Justin Lesueur (New Zealand) and Karl Swanson, Stephen Spalding (Alaska).